1. e4  ·  your move

Chess,
without the noise.

Ten bots from beginner to grandmaster strength, 122 hand-checked puzzles, endgame drills and a full game review. Built on its own chess engine and running entirely in your browser. No account, no ads, nothing to install.

Play now Solve a puzzle
05 / 06

Queen

Any number of squares, in any direction.

bots
10
Elo range
350–2350
verified puzzles
122
variants
4
accounts needed
0
1.

Play

Pick an opponent.
Any strength.

Ten bots with their own personality, all driven by the same engine at different depths and levels of randomness. Start at 350 and climb.

    Time controls

    Format is minutes | seconds added per move.

    Bullet1|02|1
    Blitz3|05|05|310|0
    Rapid15|10
    RelaxedCasual · no clock

    Four ways to play

    • StandardThe real thing.
    • Chess960Back rank shuffled into one of 960 setups. Opening theory: gone.
    • King of the HillWalk your king to one of the four centre squares and win on the spot.
    • Three-CheckGive check three times and the game is yours.
    2.

    Puzzles

    Tactics that fight back.

    All 122 puzzles are verified with the engine, and the next one is picked close to your rating. Try one right here.

    Paris Opera, 1858 · Morphy vs. the Duke & the Count

    White to move.
    Mate in one.

    Click a white piece, then its target square. Or drag it.

    Moves are checked by GAMBIT's own engine, the same one the app uses.

    Rated

    Puzzles

    Solve to raise your puzzle rating, miss and it drops. The next one adapts to how you're doing.

    5:00 · 3 strikes

    Puzzle Rush

    Five minutes, puzzles get harder as you climb. Three wrong answers and the run is over.

    3:00 · head to head

    Puzzle Battle

    Race a simulated rival through the same puzzles for three minutes, with its own battle rating.

    3.

    Train

    Make the patterns
    automatic.

    Drill the endgames every player has to know until your hands do them on their own.

    Endgame drills

    Win the position against the engine. Restart as often as you like.

    1. Two rooksladder mate
    2. Queen matebox the king in
    3. Rook matethe classic
    4. Queen vs bishopwin the piece
    5. Two bishopscorner the king
    6. King & pawnopposition

    Vision trainer

    A square name flashes up. Click it before the clock runs out.

    Learn

    Six short lessons: how the pieces move, check and mate, castling, en passant and promotion, notation, and three opening principles.

    4.

    Review

    See exactly where it slipped.

    After a game the engine replays every move, grades it and tells you what it would have played instead.

    Example: a blunder on move 23 swings the game, then a missed defence decides it.

    • ★Best
    • !Excellent
    • ✓Good
    • ?!Inaccuracy
    • ?Mistake
    • ??Blunder

    Accuracy

    A score for each side, based on how much each move gave away.

    Archive

    Every finished game is saved in your browser. Replay or review any of them later.

    Insights

    Wins, draws, losses, your average accuracy and your record against each bot.

    5.

    Your board

    Five boards.
    Three piece sets.

    Pick the board you like looking at for a few hundred moves.

    Under the hood

    A chess engine, written from scratch.

    • Move generatorChecked with perft against the known node counts, including castling, en passant and promotion.
    • SearchAlpha-beta with quiescence search and move ordering; each bot gets its own depth and randomness.
    • EvaluationMaterial, piece-square tables and a mop-up term that drives a lone king to the edge.
    • Local onlyEverything runs in your browser. Games, ratings and settings stay in local storage on your device.

    1–0 is waiting

    Your move.

    Open GAMBIT